To improve the light use efficiency of an illuminator used for a projection image display apparatus.

The apparatus includes: a first reflector which reflects a light ray emitted from a light source and acts to direct the light ray towards an image display element; and a second reflector, by which the direction of a light ray that has been emitted from the light source but has not been reflected by the first reflector is changed so that the light ray is reflected by the first reflector. The direction is changed so that the shape of the periphery of the second reflector matches the effective area of a first array lens 10.